Lawn mower



June 6, 1933.

J. GLA'SER 1,912,836

LAWN MOWER Filed Sept. 3.1 19:51. I s SIieets-Shet 1 [MEEEILEE INVENTOR.J eaep m Glaser g #45 A; TORNEY.

June 6, 1933. Q J, GLASER 1,912,836

' LAWN MOWER Filed Sept. 5, 1951 3 Sheets-Sheet 2 IIIIIII/IYI/IIIIA mulVI I/l as a 7 Fig 7 INVENTOR- Joseph Glaser fi/s ATTORNEY.

June 6, 1933. GLASER 1,912,836

LAWN MOWER I Filed Se t. 5. 1951 3 Sheets-Sheet s INVENTOR.

Joseph Glaser bQ/rv HIS A TTORNE Y.

1| operate themower so that a weaker person panying drawings in which:

Patented .I e, 1933, 1,912,836

umrso srnrss PATENT- OFFICE loam amine, or rmmmmn, minimum LAWN IowanApplication fled September 8, 1881 Serial Io. 560,864.

My invention relates to a machine for cutno need to break the weld inorder to ting grass on lawns or golf courses andreoilor repair thevarious parts. The welding lates particularly to machines generally notonly reduces the weight but also pro-.- known as lawn mowers. vides astronger construction. 7

a Heretofore, most parts of lawn mowers Other objects of my inventionare to pro- 55 have been made of cast iron with the result vide animproved device of the character dethat the average wei ht of a twelveinch scribed, that is easily and economically promower is approximate ythirty-two pounds. duced, sturdyi in construction and having a By makingall parts of my mower of maximum e ciency. With these and restampedmetal sheeting I am able to reduce lated objects in viewmy inventionconsists so the weight of a twelve-inch mower to ap- 1n the followingdetails of construction and proximately seventeen. pounds withoutdecombination of parts, as will be more fully creasing its efiiciency,or wearing qualities, understood from the following specificatherebyreducing the exertion required to trons, taken in conjunction with theaccoma as may operate the mower, or the mower may F g. 1 is a plan viewof my lawn mower; be-operatedlonger without fatigue. Fig. 2 is asectional view taken on the 3 An object of my invention is to construct111162 2 of Fig. 1;

v a light weight lawn 'mower which is made Fig. 3 is a plan view of thestationary entirely of stamped metal sheetings. blade holder;

Another object of in invention is to pro- Fig. 4 1s a sectional viewtaken on the line vide the stampedmeta 'wheels of my mower of 3; i withstamped outtreads to revent slippage F1 51s a front elevational view ofthe due to the li ht weight of t e mower. rotating blade operatingratchet wheel Another 0 ject of my invention is to proclutch; 1 vide aninternal driving gear made up of a Fig. 6 is a side view of the rotatingblade pluralit of stamped ieces which when operating ratchet wheelclutch;

fastene together and w en oiled or d Fig. 7 is a sectional view takenalon the retains the oilandgrease between e secaxis of the ground orsupporting whee and 30 tion of stampings. This provision of a includingthe clutch mec anism;

rease or oil reservoir reduces the friction Fig. 8 is an elevationalview of the side 3 tween the driving gear and the driven pinplate whichmay be stamped for use as a ion, and rmits operation with less frerightor left hand; v quent lubrication. ig. 9 is a side elevational view ofthe side 36 Another object of my invention'isto proplate;

' vide stamped gears that are more accurate Fig. 10 is an elevationalview of a modified than cast teeth gears and which will operate form ofside plate to provide a longer cutter the mower noiselessly. and/or aguard;

Another object of my invention is to pro,v Fig. 11 is a frontelevational view of the vide a rotating cutter at the forward porblankedrotary blade holder; and' tion of the mower. Fig. 12 is-a sectional viewtaken on the With these objects in view I provide a line 1212 of Fig.11. i lawn mower comprising ground wheels of Referring to the drawings,I show a lawn Y stamped metal sheeting, stamped metal side mowercomposed of ground or supporting 45 plates, stain d metal gears stampedmetal wheels, generally designated as A; rotating stationar b adecutters and a stamped roblade driving mechanism and .clutch genertaiiybla e carrier, at the forward end. ally designated as B and bladecutters C n addition to the reducing of weight of positioned at theforward direction of the my mower by using stamped metalportions mower.50 I spot weld various portions wherever there The ground, or supportingwheels A are each constructed of a single metal stamping, having itsouter edge shaped to form a tread or extension 10 parallel to the axisof the wheel with stamped projections 12 on the tread to grip the earthor ound over which the mower is moved an to prevent slippin 1%18 centralportion 14 of the wheel A is stamped to form a circular inward recesswith an opening 16 at its center so that the wheel A may rotate freelyonand provide sup ort for a ball bearing 18. The portion 14 as pressedtherein a bearing box 19 so that the box 19 will not come out.

A stud shaft 20 rigidly attached to a side plate 22 has at its free endball bearings 18 upon which the wheel A rotates. A washer 24 holds theball bearings within the ball bearing recess 14 b means of a bolt 26.

The rotating bla e driving mechanism and clutch B is composed of aninternal shrouded annular driving gear 28, a pinion 30, an annular cupshaped stain ed metal ratchet wheel 32, and a blade sha t 34 carryin aslidable engaging pin 36. The an- 'nu ar driving gear 28, is built of aplurality of thin stampings 37 having a stiffening ring 38 at the sideof the teeth of the gear 28, positioned to form a unitary shrouded.

gear structure, and is rigidly attached to the body of the ground wheelsA. The stiifenin ring 38 is slightly wider than the width 0 the gear 28to prevent the burring of the gear teeth. When the annular gear 28 iseased or oiled some of the grease-or oil w1ll seep between the latestampings 37, the stampings thereby unctioning as a lubricatingreservoir and facilitate the easy running of the mower. The casehardened machine steel driven pinion 30 is positioned upon one end ofthe pinion shaft 39 to 'engage the teeth of the driving gear 28. Thepinion shaft 39 is journaled at its center upon ball bearings 40 whichare carried within the stamped bearing housing 42, that is secured tothe side plate 22, and also carries the annular ratchet 32. To preventundue wear the ratchet 32 and the pin 36 are case hardened beforeassembly. A rotating blade shaft 34, in line with the pinion shaft 39,is journaled in ball bearings 46 which are carried in a stamped circularrecess 48 of each of the side plates 22. The slidable enga 'ng in 36 isfitted into one end of the b l de s aft 34 in such manner that it may bereciprocated per endicularly to the axis of the shaft 34. he slidable enaging, pin 36 acts as a pawl to the annu ar ratc et 32 and permitsrelative rotation. in one direction only, the pin being so shaped thatfull freedom of motion is obtained in one direction without theobjectionable noise of an ordinary ratchet.

ltiis obvious when the cutters rotate faster -than""tlre p nion then theteeth 44 of the upper-portion of the plate is an openin 49 for the wheelstub 20 having a welded ass 50. At the lower rear section of the plateis "a circular opening 52 and adjacent thereto cutter shaft 34 issupported. At the central is another opening 54, for the roller support.

Openings 52 and 56 are for tie rods, and

openings 58 and 60 are to locate the stationary blade holder 61.

The rotary blade assemblage C consists of a plurality of rotatingcutting blades 64, and an adjustable stationary cutting blade 62.Mounted upon the rotating shaft 34 are a plurality of blade holders 65,Figures 11 and 12, which are drawn blanked out and twisted at 66 b meansof a stamping press. The blade hol er is welded tothe shaft 34 at itsend 68, to insure rigidity, easeof manufacture and lightness in weight.

Rotating cutting blades 64 arecold twisted anchare attached to the freeend 7 O by means of riyets.

. The tapped hole 60 in the side plate 22 locates an ear or extension 72of the stationary blade holder 61. The blade holder 61 is stamped fromsheet metal and at the front has rivet holes 74. The rear elongated side76 of the blade holder is bent in the form of a circle for strengtheningpurposes and to enable a plug 78 to be inserted and welded at each endof the circular side 76. The plug 78 after being welded in place is thentari ped.

he stationary blade holder is rockably supported by suitable pivotsafforded bearing in the holes 60 of the side plate and it is adjustablein an upward or downward direction, relative to the blades of the rotarycutting reel, through the medium of screws ggorded guidance in thetapped apertures A ground roller 86 is attached to the side walls 22 byan extension 82. Retaining means passing through the o enings 50 and 52of the side walls 22 and t rough the extension 82 rigidly retain theroller in position. An elongated opening in the extension 82 providesfor the elevating or depressing of the roller.

A handle 84 having attaching arms 86 is of the customary construction.

In Figure 10, I show a modified form of side-plate 88 similar to plate22 with the exception that an extension 90 is at the forward end of theplate 88. The extension 90 has an opening 92 and a boss 93 welded heretofor the ground wheel stud and an opening 94 for the tie rod. The hollowtie rod through opening 94 acts as a guard when mzaeae I p I 3 thewheels are insertedin the rear opening mounted at one end of said bladeca 49 of the side plate, thus making a short shaft engaging the ratchetclutch in order mower to economize on space. A forward to revolve saiblade cutter shaft.

. or rearwardly extending rotary wheel is thus 4. In a lawn mower, aplurality of ground 5 placed at the option of the user. v wheels, sideplates from which said ground 'Since the driving and driven gearstowheels are supported by means of a stub gether with their covering 96are placed shaft rigidly fastened to a welded stub shaft within thespace occupied by the tread of support on said side plate, a bearingconthe wheel, it is to be noted that the width tamer of cup-shapedconstruction on each of of my mower is greatly reduced. said side wallsto hold bearings for a rotat- 75 Although the invention has been ableblade shaft and for a pinion, said pinm considerable detail suchdescription inion driven from a driving gear operatively tended asillustrative rather than hmltin connected to said grou d wheels, andmeans as the invention may variousl embodl to retain said bearings.

l and the scope of 3c invention is to be de- 5. In a lawn mower, thecombination of termined as c a plurality of rotatable cutters, aplurality claim:-- 1 of ground wheels, a shrouded internal driv- 1. Inalawn mower, a plurality of ground in gear mounted on each of saidground wheels each of a unitary structure, thetfie wheels a pinionoperatively engaging each of each wheel pro'ecting to form a of said Iprojections exten outwardly on said a pinion shaft mounted on each ofsaid tread, an annular 'ving ear mounted frames, clutch means mounted onsaid pinupon each of said wh sax driving gear ion shaft operativelyconnecting said rotatbeing composed of a plurality ofsimilar ablecutters, and means to d' said gear elements attached to form a unitaryrotatable cutters from said clutch when said structure and oilreservoir, a driven pinion cutters rotate faster than said pinion.operatively said driving I: and 6. In a lawn mower, the combination ofmounted upon a' pinion shaft, sai plmon a plurality of ground wheels,rotatable cutshaft rotatably mounted on roller beari to an internaldriv' ,gear mounted on located in a side plate, said pinion sha eac ofsaid und w eels, a pinion op- 95 also carrying a ratchet clutch wheel,said eratively each of said ,a pluratchet wheel ha a' plurality of teethrality of si e rames, a pinion s ft mounttherein, a rotary e cuttershaft located ed on each of said frames, clutch means in the same laneasrthe inion shaft, said mounted on said pinion shaft operatively rotaryshaft ring a sli ably mounted pin connect said rotatable cutters, saidtherem to engage the ratchet clutch teeth ground i vi 1 comprising in abody of the on] when moved in one direction, cutting wheel a treadextending at right angles to blades mounted upon said blade cutter shaftsaid body, projections on said tread to grip said blades located at' theforward end f the ground,a circular inward recess in the a 40 said mowera stati cutter moun center portion of said wheel to form a bearshaft andmm container, and hearings in said recess. forcing means for lding saidside plates. In a lawn mower, the combination of a, 2. In a lawn mower,supporting wheels plurality of und wheels, rotatable cutters androtatable cutters, side p tes supporhng means 0 ra hl y connected fordriving and Wheel! ltable utt s, a blade cutters In said wheels, aplurality of s'de 110 holder m of l mped al Sheet frames and said groundwheel comprising in ingand having atiteforward end means a body of thewheel a tread extending at so that a cutter may be attached theretoright as to said body, pro ections on I the' near side of said bladeholder being of ms t to gri the ground, a circular in-' circnlarcrosesection and pl at each end rd m in the of saidportion,-sai plugs weldedform a bearing container, and hearings in lnd l s ng p 1 said recess, anaxle rotatahl mounted in poses, and means to retain the forward side aidbearings and supported i i-om said side of the blade-holder rigidly inposition. frames. y 3. In a lawn mower, a p urahty of ground Intestimony whereof I ailix m s' time. wheels, side frames, a'gear mountedon each JOSEPH DEER.

ground wheel, a (p nion operatively engag- 1 mg sa'd gear an shaft,"rings mounted said side frame mounted u n a pinion or supporting saidpmlon shaft, a cup- 125 shaped ratchet clutch having its edge rojectmginwardly at spaced intervals to 01m th, said cup-shaped clutch mountedadjacent to said pinion shaft, a shaft adapted gears, a plurality ofside frames, 6-

center of said wheel to for carrying blade cutters, a key slidably no i

